In Mascaro v. Youth Study Center, 514 Pa. 351, 523 A.2d 1118 (1987), a juvenile being held prisoner in the city's Youth Study Center escaped because of defective locks. He then proceeded to burglarize a private home, assaulting its residents, the Mascaro family. Our Supreme Court held that the City could not be held liable for the juvenile's criminal acts even if some defect in the condition of the city-owned property facilitated the assault.